A kind of paper wet strength agent and preparation method thereof

Abstract

The invention discloses a paper wet strength agent and a preparation method thereof. By weight, the paper wet strength agent comprises: 100 parts of adipic acid; 15-40 parts of diethylenetriamine; and 20-80 parts of an active diluent. The preparation method includes: (1) mixing the diethylenetriamine, the adipic acid and the active diluents in proportion, and subjecting the mixture to a polycondensation reaction so as to obtain a polyamide polyamine epoxy polymer; and (2) mixing the polyamide polyamine epoxy polymer with deionized water, adjusting the pH value and the solid content, thus obtaining the paper wet strength agent. The paper wet strength agent provided in the invention realizes zero discharge of organic chlorine and is environmentally friendly. The method disclosed in the invention has the advantages of simple operation and low cost, thus being suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of paper wet strength agents in fine chemicals, in particular to an active diluent modified paper wet strength agent and a preparation method thereof. Background technique [0002] The wet strength of paper refers to the strength of a paper sheet when exposed to water or in a humid environment. Many paper products, especially industrial paper, require high wet strength, and the addition of wet strength agents can improve the wet strength of paper under wet conditions. Under normal circumstances, when no additives are added, the strength of the paper after being wetted is only 5%-10% of the dry strength. After adding a wet strength agent, the paper can mostly maintain the strength of 20%-40% of the original dry strength. . [0003] Paper wet strength agents can be divided into two types: permanent and temporary. Temporary paper wet strength agents are mostly used in paper products that are short-term and discarded af...

AI Technical Summary

Problems solved by technology

[0007] Chinese patent ZL201010288706.4 discloses a preparation method of a reactive diluent modified paper wet strength agent, using at least two functional epoxy diluents as crosslinking modifiers, and the wet strength of the prepared modified PAE is relatively The prior art has been further improved, but the preparation process of this method is more complicated, the preparation time is longer, and the wet strength agent prepared by this method contains a certain amount of organic chlorine, which is harmful to the environment and human health